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Blue Monday Searchlight, Surprise

Occurrence in Napa county in California, United States with commodity Manganese
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10031624
MRDS ID M010718
Record type Site
Current site name Blue Monday Searchlight, Surprise

Geographic coordinates

Geographic coordinates: -122.32356, 38.72655 (WGS84)
Relative position 15 MI. FROM MONTICELLO, 38 MI. FROM WINTERS, E. OF BLUE MONDAY PEAK.

Site location context

Political divisions (FIPS codes)

Napa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Walter Springs(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Napa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010N 004W 08 California

Commodities

Commodity Importance
Manganese Critical Tertiary

Economic information

Ore body information

  • Thickness 9.75M
    Length 38.1M
    Width 1.52M

Comments on the geologic information

  • GEOL.DESC: MANGANIFEROUS IRON ORE OUTCROPS IN 3 PLACES AND IS SURROUNDED BY BASALT. ORE IS MAINLY A MIXTURE OF IRON AND MANGANESE OXIDES PERMEATED THROUGHOUT BY OPALINE SILICA. SOME BANDS AND STREAKS OF RED CHERT ARE INCLUDED. CHERT IS HEAVILY STAINED BY BLACK MANGANESE OXIDE. SOME ORE CONTAINS INTERCALATIONS OF YELLOW CHERT. FRANCISCAN SERPENTINE IS FOUND IN THE SURROUNDING REGION.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner R. A. Dollarhyde, J. W. Charge, W. R. Hanson, Henry Hermann

Comments on the production information

  • NO PRODUCTION.

Reference information

Bibliographic references

  • Deposit

    CALIF. BULL. 125, 1943, P 145

  • Deposit

    BULL. 152, 1950, PP. 156-7

General comments

Subject category Comment text
Deposit AN ASSAY OF A SAMPLE OF THE MATERIAL IN ONE OF THE ORE ZONES GAVE THE FOLLOWING RESULT: MANGANESE, 2.25%; FERRIC OXIDE, 18.81%; AND SILICA, 66.4%. ANOTHER SAMPLE ASSAYED AS FOLLOWS:MANGANESE, 6.3%; FERRIC OXIDE, 62.22%; AND SILICA, 26.77%.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-DEC-1977 Killman, K.; Albers, J. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.